Journal article · Preprint article
Detection of Very Low-Frequency Quasi-Periodic Oscillations in the 2015 Outburst of V404 Cygni
New York University1
Open University of Israel2
NASA Goddard Space Flight Center3
University of California at Berkeley4
California Institute of Technology5
George Washington University6
University of Amsterdam7
Sabanci University8
National Institute for Astrophysics9
European Space Astronomy Centre10
National Space Institute, Technical University of Denmark11
Astrophysics and Atmospheric Physics, National Space Institute, Technical University of Denmark12
University of Oxford13
...and 3 moreIn June 2015, the black hole X-ray binary (BHXRB) V404 Cygni went into outburst for the first time since 1989. Here, we present a comprehensive search for quasi-periodic oscillations (QPOs) of V404 Cygni during its recent outburst, utilizing data from six instruments on board five different X-ray missions: Swift/XRT, Fermi/GBM, Chandra/ACIS, INTEGRAL's IBIS/ISGRI and JEM-X, and NuSTAR.
We report the detection of a QPO at 18 mHz simultaneously with both Fermi/GBM and Swift/XRT, another example of a rare but slowly growing new class of mHz-QPOs in BHXRBs linked to sources with a high orbital inclination. Additionally, we find a duo of QPOs in a Chandra/ACIS observation at 73 mHz and 1.03 Hz, as well as a QPO at 136 mHz in a single Swift/XRT observation that can be interpreted as standard Type-C QPOs.
Aside from the detected QPOs, there is significant structure in the broadband power, with a strong feature observable in the Chandra observations between 0.1 and 1 Hz. We discuss our results in the context of current models for QPO formation.
Language: | English |
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Publisher: | American Astronomical Society |
Year: | 2016 |
Pages: | 90 |
ISSN: | 15384357 and 0004637x |
Types: | Journal article and Preprint article |
DOI: | 10.3847/1538-4357/834/1/90 |
ORCIDs: | Chenevez, Jérôme , 0000-0002-1169-7486 , 0000-0002-7991-028X , 0000-0002-5311-9078 , 0000-0003-1443-593X , 0000-0002-4576-9337 , 0000-0003-0070-9872 , 0000-0001-8530-8941 , 0000-0001-5506-9855 and 0000-0001-5819-3552 |
astro-ph.HE methods: statistical relativistic processes stars: black holes